Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S
The AirTAC SAIJ125X55-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 45 to 55 mm for precise end-position tuning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads without needing external stops. The extruded aluminum barrel includes sensor grooves on both sides, and this -S variant includes a magnet for position detection.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads. It operates at speeds of 30-500 mm/s and relies on variable air cushions at both ends to decelerate the load smoothly. The rear adjuster functions strictly as a travel stop to set the retraction end, not as a locking mechanism.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S Is Used
Press Stroke Calibration
Dial in the exact 45 to 55 mm clamping depth during machine commissioning to prevent over-travel on delicate workpieces.
Product Changeover
Quickly adjust the rear stopper by up to 10 mm to accommodate slightly different product sizes on the same production line.
Heavy Assembly Positioning
Leverage 6136 N of thrust at 0.5 MPa to move heavy jigs into place, using the built-in magnet for DMSE electronic sensor feedback.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder (providing 2513 N push at 0.5 MPa) lacks the thrust for your setup, but a 160 mm bore is physically oversized. The 10 mm adjustment range is ideal for fine-tuning the end stop during machine commissioning or product changeovers, offering flexibility that a fixed-stroke SAI cylinder cannot provide. If your application requires holding the load without continuous live air pressure, the SAIJ adjuster will not suffice; you should select a SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
For an exact ISO 15552 replacement, match the 125 mm bore, 55 mm stroke, 10 mm adjustment range, PT port threads, and the -S magnet requirement. The SAIJ mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster allows you to shorten the nominal 55 mm stroke by up to 10 mm, creating a 45 to 55 mm usable travel window. This stopper only sets the end position and does not lock the load without live air pressure.
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